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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef ExclusionShapeInsideInfo_h
#define ExclusionShapeInsideInfo_h
#if ENABLE(CSS_EXCLUSIONS)
#include "ExclusionShape.h"
#include "FloatRect.h"
#include "LayoutUnit.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class RenderBlock;
class ExclusionShapeInsideInfo {
WTF_MAKE_FAST_ALLOCATED;
public:
~ExclusionShapeInsideInfo();
static PassOwnPtr<ExclusionShapeInsideInfo> create(RenderBlock* block) { return adoptPtr(new ExclusionShapeInsideInfo(block)); }
static ExclusionShapeInsideInfo* exclusionShapeInsideInfoForRenderBlock(const RenderBlock*);
static ExclusionShapeInsideInfo* ensureExclusionShapeInsideInfoForRenderBlock(RenderBlock*);
static void removeExclusionShapeInsideInfoForRenderBlock(const RenderBlock*);
static bool isExclusionShapeInsideInfoEnabledForRenderBlock(const RenderBlock*);
LayoutUnit shapeLogicalTop() const { return shapeLogicalBoundsY(); }
LayoutUnit shapeLogicalBottom() const { return shapeLogicalBoundsMaxY(); }
bool lineOverlapsShapeBounds() const { return m_lineTop < shapeLogicalBottom() && m_lineTop + m_lineHeight >= shapeLogicalTop(); }
bool hasSegments() const
{
return lineOverlapsShapeBounds() && m_segments.size();
}
const SegmentList& segments() const
{
ASSERT(hasSegments());
return m_segments;
}
bool computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight);
void computeShapeSize(LayoutUnit logicalWidth, LayoutUnit logicalHeight);
void dirtyShapeSize() { m_shapeSizeDirty = true; }
private:
ExclusionShapeInsideInfo(RenderBlock*);
inline LayoutUnit shapeLogicalBoundsY() const
{
ASSERT(m_shape);
// Use fromFloatCeil() to ensure that the returned LayoutUnit value is within the shape's bounds.
return LayoutUnit::fromFloatCeil(m_shape->shapeLogicalBoundingBox().y());
}
inline LayoutUnit shapeLogicalBoundsMaxY() const
{
ASSERT(m_shape);
// Use fromFloatFloor() to ensure that the returned LayoutUnit value is within the shape's bounds.
return LayoutUnit::fromFloatFloor(m_shape->shapeLogicalBoundingBox().maxY());
}
RenderBlock* m_block;
OwnPtr<ExclusionShape> m_shape;
LayoutUnit m_lineTop;
LayoutUnit m_lineHeight;
LayoutUnit m_logicalWidth;
LayoutUnit m_logicalHeight;
SegmentList m_segments;
bool m_shapeSizeDirty;
};
}
#endif
#endif
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